App development · London
App development in London
Your app needs to work under load, pass App Store review, and solve a real problem your users face. We build mobile apps for London's finance, tech, media and regulated sectors—from tight MVP scope through to live support.
App development for London businesses
Hubb Group is a digital agency and software company. Our studio is in Dubai and we work with UK clients remotely, on UK hours, with a named lead on every project. Contracts and invoices are issued by our UAE company, in pounds.
We measure app success by retention, crash rates, app store reviews and how the backend performs under load. For business apps: feature adoption, user sign-ups and integration health. For consumer apps: daily and monthly active users, session length and uninstall rates. No guesses. Data from your real app in the wild.
Every project is a fixed quote with a clear timeline and clear milestones. You own the work and the accounts outright when we're done — no lock-in, and nothing you can't take with you.
Sectors we work with in London
- Finance and fintech
- Professional services
- Media and publishing
- Retail and e-commerce
- Regulated tech
- Property and real estate
Apps built for London's biggest sectors
Finance, fintech, media, retail and professional services all operate at scale from London. Their apps need to handle volume, meet strict review guidelines, and integrate with systems already in production. We've built apps across these sectors. Each one demanded something different—but all of them demanded reliability on day one.
We start by scoping what actually matters. Your MVP isn't everything you could build. It's the smallest version that solves one clear problem. That focus cuts your timeline, reduces build cost, and gets you live faster. Everything else comes after the data tells you what users want.
Backend and offline-first architecture
A native or cross-platform app without a solid backend is just half a product. We build the server-side systems that handle authentication, data sync, API integrations and the unexpected traffic spikes. Offline behaviour matters too—your app needs to work when the connection drops and sync cleanly when it returns.
London buyers and their auditors expect systems that degrade gracefully, not break. We design for that from the start. No post-launch surprises. No sudden scaling costs when demand goes up.
App Store and Play Store review, done right
Both app stores have review criteria. Apple's are notoriously strict. We've submitted dozens of apps—we know what triggers a rejection and what passes first time. Accessibility isn't optional here. Neither is handling sensitive data properly, respecting platform guidelines, or building in a way reviewers can actually test.
Compliance sits in the brief, not at the end. We build for your sector's specific rules—payment processing, data residency, user consent—before code review starts. That saves weeks of back-and-forth with the app store and your own legal team.
Maintenance and iteration after launch
Launch day is not finish day. iOS and Android release updates twice a year. Your user base will grow. New payment methods, device types and edge cases will emerge. We provide ongoing maintenance that keeps your app current, handles urgent fixes and supports new features as they're justified by user data.
A London business running a regulated product or handling financial data needs reliable support. No ghost handover to a junior developer somewhere. You get a team that knows your codebase, your sector's constraints, and how your users actually behave.
App development in London — common questions
How long does it take to get an app to the App Store?
Scoping and build typically take 8–12 weeks for an MVP. App Store review adds 1–2 weeks. We've never had a rejection when we've built in compliance from the start—which matters because a review rejection in London means losing momentum against your competitors.
Do you build for iOS only, or Android too?
We build native apps for iOS and Android separately, or cross-platform apps using React Native or Flutter depending on your timeline and budget. Cross-platform is faster and cheaper; native is better for performance-critical features. We tell you which fits your brief.
What happens after launch?
We provide ongoing maintenance—OS updates, bug fixes, monitoring and security patches. New features are scoped separately and priced on scope. Most London-based clients keep us on retainer. It's cheaper and faster than reboarding a new team later.
How do you price app development?
By scope and complexity. We scope ruthlessly—cutting anything that doesn't solve your core user problem—then price based on estimated build hours and ongoing support. A clear scope means no surprises. Fixed fees are possible once the brief is locked.
Do you handle payment processing and compliance?
Yes. Payment integration, data handling, user consent and sector-specific rules are built in from the start. We work with your legal team during scoping so there are no compliance blockers between build and launch.
What if my app needs to integrate with systems we already use?
That's standard. We build APIs and integrations with your existing software—accounting, CRM, payment gateways, whatever you depend on. We map those dependencies in the scope phase so integration work doesn't derail your timeline.
Everything we deliver includes
Scoped to ship
A first version people will actually open, priced before the build starts.
Store review handled
App Store and Play requirements — privacy, account deletion, demo logins — dealt with.
Works on a bad connection
Offline behaviour and accessibility treated as requirements, not polish.
Fixed prices
A clear quote and timeline up front — no open-ended retainers, no surprises.
A named lead
One person who knows the build, on UK hours, not a ticket queue.
Yours to own
Code, signing keys and store listings in your name.
More on app development
Jargon check: Headless Commerce
Where we work across Greater London
- App development in City of London
- App development in Canary Wharf
- App development in Shoreditch
- App development in Soho
- App development in Mayfair
- App development in King's Cross
- App development in Clerkenwell
- App development in London Bridge
- App development in Hammersmith
- App development in Stratford
- App development in Croydon
- App development in Bromley
- App development in Kingston upon Thames
- App development in Richmond
- App development in Wimbledon
- App development in Ealing
- App development in Harrow
- App development in Ilford
- App development in Romford
Need app development in London?
Tell us what you need and we'll come back with a fixed quote and a timeline — usually the same day.